[rambambam]

I have been thinking of building some flashcard-like app for these English words I come across all the time, but never remember (to give you an idea: "exuberance" for example). Any integration with Google Translate would be cool, because the moment I look up some word, it should be added as a flashcard, together with the translation. Every time I look up a new word, I should be tested for a few old words, to see if I still remember them.

[BillFranklin]

Using the Google Translate app is great as it saves the things you translate. You could also check out http://www.cram.com/ or Memrise as I think they have account features. This is purely a 'show me the top 1k german words' app, I might make it the top 10000 if my German improves and build in other lists for phrases, numbers and other groups.